compilation fix for wxGTK

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@21345 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/msgout.cpp

@@ -121,7 +121,8 @@ void wxMessageOutputDebug::Printf(const wxChar* format, ...)
         #endif
     }
 #else // !MSW, !Mac
-    wxFputs(out, stderr);
+    // FIXME: why is wxFputs() not defined under Linux?
+    fputs(out.mb_str(), stderr);
     fflush(stderr);
 #endif // platform
 }